Anthropic API
Developer REST API for programmatic access to Anthropic's Claude models (Opus, Sonnet, Haiku), featuring prompt caching, extended thinking, tool use, computer use, and the Agent SDK for production agents. Best for developers and teams building AI apps and coding agents; a direct alternative to the OpenAI API.
Capabilities
What it does
Accepts
Produces
Pricing
Samples
Alternatives to Anthropic API
Cohere
Enterprise AI platform with Command R+ language model, Retrieval Augmented Generation, and multilingual text understanding for businesses.
LlamaIndex
Open-source data framework (Python & TypeScript) for building RAG pipelines and agents over your own data: 160+ data connectors, indexing, retrieval, and query engines, plus LlamaParse/LlamaCloud for parsing complex documents. Best for developers building document-grounded LLM apps; a leading alternative to LangChain.
LangChain
Open-source framework (Python and JavaScript) for building LLM apps and AI agents, chaining models, prompts, memory, and 1,000+ tool and data integrations behind one provider-agnostic interface. Best for developers who want to swap model providers in a single line; pairs with LangGraph for orchestration and LangSmith for observability.
Together AI
Cloud platform for running and fine-tuning open-source AI models at scale. Offers fast inference API for Llama, Mixtral, and 100+ models.
Hugging Face
Open-source hub for machine learning — often called "GitHub for ML" — hosting 2M+ pretrained models, 700K+ datasets, and interactive Spaces demo apps, plus the Transformers library and Inference API to run, fine-tune, or deploy them. Best for developers and researchers building or sharing AI models across text, vision, and audio.
